当您看到火山喷发时喷涌而出的白色浪云时，云朵中大部分是水蒸气。

When volcanoes erupt and you see a white billowing cloud hurtling to the sky, much of that is water vapor.

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当您看到火山喷发时喷涌而出的白色浪云时，云朵中大部分是水蒸气。

When volcanoes erupt and you see a white billowing cloud hurtling to the sky, much of that is water vapor.

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